---
title: "Check Vocabulary Usage"
method: POST
path: "/lessons/situations/{passage_id}/check-usage"
tags: ["lessons", "lessons"]
---

# Check Vocabulary Usage

`POST /lessons/situations/{passage_id}/check-usage`

Real-time check: given a user message, detect which vocabulary/grammar was used.
Returns updated usage state and newly matched items.

## Path parameters

- `passage_id` string, uuid, required

## Headers

- `authorization` string, nullable

## Request body

- object

## Response `200`

Successful Response

- unknown

## Other responses

- `422` — Validation Error

---

[API](https://skmtc.dev/fluentea/apis/aurqa-language-learning-platform-refactored.md) · [All operations](https://skmtc.dev/fluentea/apis/aurqa-language-learning-platform-refactored/llms.txt) · [OpenAPI document](https://skmtc-service-production.skmtc.workers.dev/v1/apis/fluentea/aurqa-language-learning-platform-refactored/revisions/45cbba31aa7d/schema)